Centrifugal pump.



J. mmsr, GENTRIPUGAL PUMP.

APPLICATION FILED NOV. 28, 1909.

978,753. Patented Dec. 13, 1910.

, cuiar ()FFICE.

JOSEPH HUBST, F LQUISVILLE. KENTUCKY.

QEWTRIFUGAL WMF.

sw l w" of 3mm Pmni- Patented Dec. 13, 1919.

Applifintlon filed loveinber 23; 180.. Serial No. 529.601.

To all wlwnz; com-om:

Be it known that 1, Joanna Honor, :1 oil'lzon of the United States, residing at Louisviiie, in the county of Jeficrson and State of Kentucky, have invented certain new and useful Improvements in Centrifugal Pumps, of which the followin is a specification.

This invention reintes to centrifugal pumps designed for dredging purposes. In pumps of this kind, the loladcs soon wear uwny sit their inner ends from the sand, gravel, and other hard substances passing through the pump and coming in contact with the blades at this point.

It is the object of the present invention to fit the blades with removable wear blocks so that when worn they muv be removed and replaced by new ones, and with his objeot in view, the invention consists in a novei comtruotion and arrangement of parts to be hereinaficr described and claimed.

In orden that the invcniion may he better understood, reference is lied to the accompanying drawing; forming a part of this specification. in which drowing,-

Figure l is u veriical section of the pump on ihe line 1-1 of Fig. 2. Fig, 2 is a section onthe line 2-2 of Fig. 1.

In the LiEflWlKlgZ, 5 denotes the casing. of the pumn which is mounted on a suitable base 6. To the casing is connected it delivcry pipe '4. The casing is circular and its rear Wnil 8 has a hearing 9 in which is suppoi'icd the sluifi 10 of the rotor. The rear wall may he formed integral withthe cuising. The front wall is a circular plate 11 which is bolted ()l otherwise secured to the casing, so'that ihc rotor may he placed in the casing. At the eenter of the note 11 is an opening 13 which is the iniet of the 'pnmp, the suction pipe 12 being connexted to the date so no to communicate with s'mid opening The rotor comprises spaced cirisizs'i/i and i5, mspectivelv, the former being made fast in lheehait 10. said shaft extending into the casing through the bearing 9. In the center of the disk is an opening 16 which registers; with the opening 13 in the late 11. Between the disks 14 and 15 etc ocated 'radiolly extending blades 17 which curved in the direction of their length, as usual in centrifugal pumps.

These hlud'cs radiate from the opening 16,

and extend to the periphery of the disks 14 i i l l l l l and 15, said disks having ihe'smne diameter. The hlodm also extend entirely across; the mace bein'ccn ihe two disks. The hiadeo mev he formed inte mii wiih the disl: if), and bolicd to the dis c 14, so thoi both disks and the blades will rotate with the shaft 10, the letter having i1 belt pulley 18, or other power transmittin device for imparting n rotary motion to t 1e shaft. In operation, the material enters the ing 5 through the opening i3, and posses into the s ace heiween the disks l4 and 15, througi iho opening iii, whereupon it is forced by the blades 1'4" toihe delivery pipe 2 In actual practice, it has been found that the blades iii weer rapidly at lheir inner ends, or their ends nearest the openin 16. This wear is caused by the sand, grove and other hard substances coming in contact with the blades at this point. Inasmuch as this wear reetly reduces the eliiciency of the pump, fhave fitted the blnde'sfwith removable wear blocks 19, these blocks being located at the inner ends of the blades, or next to the opening 16, and their main body ortion having a. thicknoqs and shape so that the conlinuit of the curved surfaces of the blades mil not be interrupted, and forming the tips of the blades. The blocks 19 are secured by bolts 20 which are oountersnnk in the convex or working Sides of the bladm so that wlhcre will he no ports projecting therefrom lo interfere with the proper working" of the biades. The nuts 21 of the bolts Met screwed against the concave sides of the blades, .The ends of the blades to which the blocks 19 are secured, and. iho

oontiguous ends of said blocks are reduced in thickness,v the extremities of the reduced ends of said parts being undercut, so that a rigid connection may be made. The re duced end of the blade form's a recess in receive the reduced end of the block. The sections 19 will be made of hardened steel. and when worn they can be readily removed, and replaced by new ones.

I claim:

A centrifugal pump having its blades fitted with removable wear" blocks at their ends nearest to the axis of the ump, said blocks forming the tips of the laden, and the main body portion of the blocks having a thickness and shape to form a solid con- 'iinmz'iw @E the Eximlas the inner ends of the Masks :aduced. m tinckness, am?

'" 512m She rauced portions In testimony whereef 1 RE my ture in presume of twa wimsses;

JQSETPH HQ Witnesses THQMAE C. SMALL, Gr. M. DH-YENDERFEH.

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